Week9 [23/11] - [29/11]
Added Lighting Changes for Vertex Normal Calculation Added Method to Get a Polygons Vertices as a Vector array Added Methods to Add the Color to a Polygon and Vertex Object Added Normalization to the Polygon normal vector Added Vector Normal Calculation to the Model Class Added Light Calculation method to the Rasterizer Class Added Flag to Rasterizer to stop processing when the screen is minimised Added Flat and Gouraud Drawing Methods to the Resterizer Added Standard and INT triangle drawing Methods Added Function to mimic sgn function from Java Added Length to Vector3D class Added / operator to Vector3D class Added Get(x,y,z,w)Int methods to Vertex class Changed Color Variables on the Vertex/Polygon classes to use r, g and b values rather than COLORREF Changed Camera translation functions to use normal Translation Functions Cleaned up Code Removed Unused code from the Camera Class
This commit is contained in:
IDunnoDev
627
Rasteriser.cpp
627
Rasteriser.cpp
@ -5,8 +5,6 @@ Rasteriser app;
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bool Rasteriser::Initialise()
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{
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Model modelA;
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Model modelB;
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Model modelC;
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if (MD2Loader::LoadModel(".\\marvin.MD2", modelA, &Model::AddPolygon, &Model::AddVertex))
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{
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_sceneModels.push_back(modelA);
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@ -15,29 +13,15 @@ bool Rasteriser::Initialise()
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{
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return false;
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}
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if (MD2Loader::LoadModel(".\\megaman.MD2", modelB, &Model::AddPolygon, &Model::AddVertex))
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{
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_sceneModels.push_back(modelB);
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}
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else
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{
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return false;
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}
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_lights.push_back(new AmbientLight(150, 150, 150));
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//_lights.push_back(new AmbientLight(255, 255, 255));
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_lights.push_back(new DirectionalLight(Vector3D(-1, 0, -1), 150, 150, 150));
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//_lights.push_back(new PointLight(Vertex(-10, 0, 10), 0, 1, 0, 100, 0, 0));
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_cameras.push_back(Camera(0.0f, 0.0f, 0.0f, Vertex(0.0f, 0.0f, -50.0f)));
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if (MD2Loader::LoadModel(".\\w_railgun.MD2", modelC, &Model::AddPolygon, &Model::AddVertex))
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{
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_sceneModels.push_back(modelC);
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}
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else
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{
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return false;
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}
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_lights.push_back(new AmbientLight(50, 50, 50));
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_lights.push_back(new DirectionalLight(Vector3D(1, 0, 1), 50, 0, 0));
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_lights.push_back(new PointLight(Vertex(0, 10, 0), 0, 1, 0, 100, 0, 0));
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_cameras.push_back(Camera(0.0f, 0.0f, 0.0f, Vertex(0.0f, 0.0f, -100.0f)));
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_screenMinimized = false;
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return true;
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}
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@ -60,79 +44,124 @@ Camera& Rasteriser::GetCurrentCamera()
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return GetCamera(_currentCamera);
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}
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void Rasteriser::CalculateLighting(Model& currentModel, bool fullLightRender)
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{
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{
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for (int pi = 0; pi < currentModel.GetPolygonCount(); pi++)
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{
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if (!currentModel.GetPolygon(pi).GetCulled())
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{
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if (fullLightRender)
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{
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for (int i = 0; i < currentModel.GetPolygon(pi).GetPolygonVertexCount(); i++)
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{
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COLORREF colorWorking = RGB(0, 0, 0);
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for (Light* currentLight : _lights)
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{
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colorWorking = currentLight->CalculateLight(currentModel, currentModel.GetVertex(pi, i), colorWorking);
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}
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currentModel.SetVertexColor(pi, i, colorWorking);
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}
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}
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else
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{
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COLORREF colorWorking = RGB(0, 0, 0);
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for (Light* currentLight : _lights)
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{
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colorWorking = currentLight->CalculateLight(currentModel, currentModel.GetPolygon(pi), colorWorking);
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}
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currentModel.SetPolygonColor(pi, colorWorking);
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}
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}
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}
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}
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}
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void Rasteriser::Update(const Bitmap& bitmap)
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{
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int currentRot = (_rotation % 360);
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Vertex startPos = Vertex(-50, 0, 0);
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int currentZOff = 0;
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int currentModelIndex = 0;
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if (bitmap.GetWidth() == 0 || bitmap.GetHeight() == 0)
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{
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_screenMinimized = true;
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}
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else
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{
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_screenMinimized = false;
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}
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for (Model ¤tModel : _sceneModels)
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{
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currentModel.EnqueueTransform(GetTranslateMatrix(startPos));
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currentModel.EnqueueTransform(GetRotationMatrix(Axis::Y, (float) currentRot));
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startPos.SetX(startPos.GetX() + 50);
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if ((currentModelIndex % 2) == 1)
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if (!_screenMinimized)
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{
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int currentRot = (_rotation % 360);
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Vertex startPos = Vertex(0, 0, 20);
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int currentZOff = 0;
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int currentModelIndex = 0;
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for (Model& currentModel : _sceneModels)
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{
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currentZOff = 0;
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currentModel.EnqueueTransform(GetTranslateMatrix(startPos));
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currentModel.EnqueueTransform(GetRotationMatrix(Axis::Y, (float)currentRot));
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//startPos.SetX(startPos.GetX() + 100);
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if ((currentModelIndex % 2) == 1)
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{
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currentZOff = 0;
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}
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else
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{
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currentZOff = 100;
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}
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//startPos.SetZ((float)currentZOff);
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currentModelIndex++;
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}
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_currentAspectRatio = (float)(bitmap.GetWidth() / (float)bitmap.GetHeight());
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_currentPerspectiveMatrix = GetPerspectiveProjectionMatrix(1, _currentAspectRatio);
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_currentViewMatrix = GetViewMatrix(1, bitmap.GetWidth(), bitmap.GetHeight());
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if (_rotation == 360)
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{
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_rotation = 0;
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}
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else
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{
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currentZOff = 100;
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}
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startPos.SetZ((float)currentZOff);
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currentModelIndex++;
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_rotation += 1;
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}
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}
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_currentAspectRatio = (float)(bitmap.GetWidth() / bitmap.GetHeight());
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_currentPerspectiveMatrix = GetPerspectiveProjectionMatrix(1, _currentAspectRatio);
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_currentViewMatrix = GetViewMatrix(1, bitmap.GetWidth(), bitmap.GetHeight());
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if (_rotation == 360)
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{
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_rotation = 0;
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}
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else
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{
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_rotation += 1;
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}
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}
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void Rasteriser::Render(const Bitmap& bitmap)
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{
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ClearViewport(bitmap);
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SelectObject(bitmap.GetDC(), GetStockObject(DC_BRUSH));
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SelectObject(bitmap.GetDC(), GetStockObject(DC_PEN));
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for (Model ¤tModel : _sceneModels)
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if (!_screenMinimized)
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{
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currentModel.SetReflectionCoefficient(0.5f, 0.5f, 0.5f);
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Matrix workingMatrix = workingMatrix.IdentityMatrix();
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for (Matrix currentTransform : currentModel.GetPendingTransforms())
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ClearViewport(bitmap);
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SelectObject(bitmap.GetDC(), GetStockObject(DC_BRUSH));
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SelectObject(bitmap.GetDC(), GetStockObject(DC_PEN));
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for (Model& currentModel : _sceneModels)
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{
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workingMatrix *= currentTransform;
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}
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currentModel.ApplyTransformToLocalVertices(workingMatrix);
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currentModel.CalculateBackfaces(GetCurrentCamera());
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for (Polygon3D ¤tPolygon : currentModel.GetPolygons())
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{
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if (!currentPolygon.GetCulled())
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currentModel.SetReflectionCoefficient(0.5f, 0.5f, 0.5f);
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Matrix workingMatrix = workingMatrix.IdentityMatrix();
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for (Matrix currentTransform : currentModel.GetPendingTransforms())
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{
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COLORREF colorWorking = RGB(0, 0, 0);
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for (Light* currentLight : _lights)
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{
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colorWorking = currentLight->CalculateLight(currentModel, currentPolygon, colorWorking);
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}
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currentPolygon.SetColor(colorWorking);
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workingMatrix *= currentTransform;
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}
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currentModel.ApplyTransformToLocalVertices(workingMatrix);
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currentModel.ApplyTransformToTransformedVertices(GetCurrentCamera().GetCurrentCameraTransformMatrix());
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currentModel.CalculateBackfaces(GetCurrentCamera());
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currentModel.Sort();
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currentModel.CalculateVertexNormals();
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CalculateLighting(currentModel, true);
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currentModel.ApplyTransformToTransformedVertices(_currentPerspectiveMatrix);
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currentModel.DehomogenizeAllVertices();
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currentModel.ApplyTransformToTransformedVertices(_currentViewMatrix);
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//DrawWireFrame(bitmap.GetDC(), currentModel);
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//DrawSolidFlat(bitmap.GetDC(), currentModel);
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//DrawRasterisedSolidFlat(bitmap.GetDC(), currentModel);
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DrawGouraud(bitmap.GetDC(), currentModel);
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currentModel.ClearPendingTransforms();
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}
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currentModel.ApplyTransformToTransformedVertices(GetCurrentCamera().GetCurrentCameraTransformMatrix());
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currentModel.Sort();
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currentModel.ApplyTransformToTransformedVertices(_currentPerspectiveMatrix);
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currentModel.DehomogenizeAllVertices();
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currentModel.ApplyTransformToTransformedVertices(_currentViewMatrix);
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DrawSolidFlat(bitmap.GetDC(), currentModel);
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currentModel.ClearPendingTransforms();
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}
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}
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@ -221,4 +250,442 @@ void Rasteriser::DrawSolidFlat(HDC hDc, Model& model)
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Polygon(hDc, pointArray.data(), currentPolygonVertexCount);
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}
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}
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}
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}
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void Rasteriser::DrawRasterisedSolidFlat(HDC hDc, Model& model)
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{
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int modelPolygonCount = (int)model.GetPolygonCount();
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for (int i = 0; i < modelPolygonCount; i++)
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{
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if (!model.GetPolygon(i).GetCulled())
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{
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vector<Vertex> vertexArray = model.GetPolygonVertexArray(i);
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FillPolygonFlat(hDc, vertexArray, model.GetPolygon(i).GetColor());
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}
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}
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}
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void Rasteriser::DrawGouraud(HDC hDc, Model& model)
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{
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int modelPolygonCount = (int)model.GetPolygonCount();
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for (int i = 0; i < modelPolygonCount; i++)
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{
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if (!model.GetPolygon(i).GetCulled())
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{
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vector<Vertex> vertexArray = model.GetPolygonVertexArray(i);
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FillPolygonGouraud(hDc, vertexArray);
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}
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}
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}
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bool VerticiesYCompareAsc(Vertex& v1, Vertex& v2)
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{
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return v1.GetY() < v2.GetY();
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}
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void Rasteriser::FillPolygonFlat(HDC hDc, vector<Vertex>& verts, COLORREF colorIn)
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{
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sort(verts.begin(), verts.end(), VerticiesYCompareAsc);
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if (verts[1].GetY() == verts[2].GetY())
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{
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FillFlatSideTriangle(hDc, verts[0], verts[1], verts[2], colorIn);
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}
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else if (verts[0].GetY() == verts[1].GetY())
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{
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FillFlatSideTriangle(hDc, verts[2], verts[0], verts[1], colorIn);
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}
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else
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{
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Vertex temp = Vertex(verts[0].GetX() + ((verts[1].GetY() - verts[0].GetY()) / (verts[2].GetY() - verts[0].GetY())) * (verts[2].GetX() - verts[0].GetX()), verts[1].GetY(), verts[1].GetZ());
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if (verts[1].GetX() < temp.GetX())
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{
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FillFlatSideTriangle(hDc, verts[0], verts[1], temp, colorIn);
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FillFlatSideTriangle(hDc, verts[2], verts[1], temp, colorIn);
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}
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else
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{
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FillFlatSideTriangle(hDc, verts[0], temp, verts[1], colorIn);
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FillFlatSideTriangle(hDc, verts[2], temp, verts[1], colorIn);
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}
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}
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}
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void Rasteriser::FillFlatSideTriangle(HDC hDc, const Vertex& v1, const Vertex& v2, const Vertex& v3, COLORREF colorIn)
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{
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Vertex tempA = Vertex(v1);
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Vertex tempB = Vertex(v1);
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bool changed1 = false;
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bool changed2 = false;
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int dx1 = (int)ceil(abs(v2.GetX() - v1.GetX()));
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int dy1 = (int)ceil(abs(v2.GetY() - v1.GetY()));
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int dx2 = (int)ceil(abs(v3.GetX() - v1.GetX()));
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int dy2 = (int)ceil(abs(v3.GetY() - v1.GetY()));
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int signx1 = (int)sgn(v2.GetX() - v1.GetX());
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int signx2 = (int)sgn(v3.GetX() - v1.GetX());
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int signy1 = (int)sgn(v2.GetY() - v1.GetY());
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int signy2 = (int)sgn(v3.GetY() - v1.GetY());
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if (dy1 > dx1)
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{
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int tempInt = dx1;
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dx1 = dy1;
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dy1 = tempInt;
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changed1 = true;
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}
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if (dy2 > dx2)
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{
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int tempInt = dx2;
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dx2 = dy2;
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dy2 = tempInt;
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changed2 = true;
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}
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int e1 = 2 * dy1 - dx1;
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int e2 = 2 * dy2 - dx2;
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for (int i = 0; i <= dx1; i++)
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{
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int startPoint;
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int endPoint;
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if (tempA.GetXInt() < tempB.GetXInt())
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{
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startPoint = tempA.GetXInt();
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endPoint = tempB.GetXInt();
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}
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else
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{
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startPoint = tempB.GetXInt();
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endPoint = tempA.GetXInt();
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}
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for (int xi = (int)ceil(startPoint); xi <= endPoint; xi++)
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{
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SetPixel(hDc, xi, tempA.GetYInt(), colorIn);
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}
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while (e1 >= 0)
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{
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if (changed1)
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{
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tempA.SetX(tempA.GetX() + signx1);
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}
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else
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{
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tempA.SetY(tempA.GetY() + signy1);
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}
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e1 = e1 - 2 * dx1;
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}
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if (changed1)
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{
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tempA.SetY(tempA.GetY() + signy1);
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}
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else
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{
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tempA.SetX(tempA.GetX() + signx1);
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}
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e1 = e1 + 2 * dy1;
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while (tempB.GetY() != tempA.GetY())
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{
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while (e2 >= 0)
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{
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if (changed2)
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{
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tempB.SetX(tempB.GetX() + signx2);
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}
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else
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{
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tempB.SetY(tempB.GetY() + signy2);
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}
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e2 = e2 - 2 * dx2;
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}
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if (changed2)
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{
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tempB.SetY(tempB.GetY() + signy2);
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}
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else
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{
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tempB.SetX(tempB.GetX() + signx2);
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}
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e2 = e2 + 2 * dy2;
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}
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}
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}
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void Rasteriser::FillPolygonGouraud(HDC hDc, vector<Vertex>& verts)
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{
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sort(verts.begin(), verts.end(), VerticiesYCompareAsc);
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if (verts[1].GetY() == verts[2].GetY())
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{
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FillGouraudBottomFlatTriangle(hDc, verts[0], verts[1], verts[2]);
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}
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else if (verts[0].GetY() == verts[1].GetY())
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{
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FillGouraudTopFlatTriangle(hDc, verts[0], verts[1], verts[2]);
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}
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else
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{
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Vertex temp = Vertex(verts[0].GetX() + ((verts[1].GetY() - verts[0].GetY()) / (verts[2].GetY() - verts[0].GetY())) * (verts[2].GetX() - verts[0].GetX()), verts[1].GetY(), verts[1].GetZ());
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temp.SetNormal(verts[1].GetNormal());
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float cRed = GetRValue(verts[0].GetColor()) + ((verts[1].GetY() - verts[0].GetY()) / (verts[2].GetY() - verts[0].GetY())) * (GetRValue(verts[2].GetColor()) - GetRValue(verts[0].GetColor()));
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float cGreen = GetGValue(verts[0].GetColor()) + ((verts[1].GetY() - verts[0].GetY()) / (verts[2].GetY() - verts[0].GetY())) * (GetGValue(verts[2].GetColor()) - GetGValue(verts[0].GetColor()));
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float cBlue = GetBValue(verts[0].GetColor()) + ((verts[1].GetY() - verts[0].GetY()) / (verts[2].GetY() - verts[0].GetY())) * (GetBValue(verts[2].GetColor()) - GetBValue(verts[0].GetColor()));
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temp.SetColor(RGB((int)cRed, (int)cGreen, (int)cBlue));
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temp.SetColor(verts[1].GetColor());
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FillGouraudBottomFlatTriangle(hDc, verts[0], verts[1], temp);
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FillGouraudTopFlatTriangle(hDc, verts[1], temp, verts[2]);
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}
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}
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void Rasteriser::FillGouraudBottomFlatTriangle(HDC hDc, const Vertex& v1, const Vertex& v2, const Vertex& v3)
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{
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float slope1 = (float)(v2.GetX() - v1.GetX()) / (float)(v2.GetY() - v1.GetY());
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float slope2 = (float)(v3.GetX() - v1.GetX()) / (float)(v3.GetY() - v1.GetY());
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float x1 = (float)v1.GetX();
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float x2 = (float)v1.GetX() + 0.5f;
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if (slope2 < slope1)
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{
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float slopeTmp = slope1;
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slope1 = slope2;
|
||||
slope2 = slopeTmp;
|
||||
}
|
||||
|
||||
for (int scanlineY = (int)v1.GetY(); scanlineY <= (int)v2.GetY(); scanlineY++)
|
||||
{
|
||||
float iRedA = (scanlineY - v2.GetY()) / (v1.GetY() - v2.GetY()) * v1.GetR() + (v1.GetY() - scanlineY) / (v1.GetY() - v2.GetY()) * v2.GetR();
|
||||
float iRedB = (scanlineY - v3.GetY()) / (v1.GetY() - v3.GetY()) * v1.GetR() + (v1.GetY() - scanlineY) / (v1.GetY() - v3.GetY()) * v3.GetR();
|
||||
float iGreenA = (scanlineY - v2.GetY()) / (v1.GetY() - v2.GetY()) * v1.GetG() + (v1.GetY() - scanlineY) / (v1.GetY() - v2.GetY()) * v2.GetG();
|
||||
float iGreenB = (scanlineY - v3.GetY()) / (v1.GetY() - v3.GetY()) * v1.GetG() + (v1.GetY() - scanlineY) / (v1.GetY() - v3.GetY()) * v3.GetG();
|
||||
float iBlueA = (scanlineY - v2.GetY()) / (v1.GetY() - v2.GetY()) * v1.GetB() + (v1.GetY() - scanlineY) / (v1.GetY() - v2.GetY()) * v2.GetB();
|
||||
float iBlueB = (scanlineY - v3.GetY()) / (v1.GetY() - v3.GetY()) * v1.GetB() + (v1.GetY() - scanlineY) / (v1.GetY() - v3.GetY()) * v3.GetB();
|
||||
|
||||
for (int xi = (int)ceil(x1); xi < (int)x2; xi++)
|
||||
{
|
||||
float redTmp = (x2 - xi) / (x2 - x1) * iRedA + (xi - x1) / (x2 - x1) * iRedB;
|
||||
float greenTmp = (x2 - xi) / (x2 - x1) * iGreenA + (xi - x1) / (x2 - x1) * iGreenB;
|
||||
float blueTmp = (x2 - xi) / (x2 - x1) * iBlueA + (xi - x1) / (x2 - x1) * iBlueB;
|
||||
|
||||
COLORREF currentColor = RGB(BoundsCheck(0, 255, (int)redTmp), BoundsCheck(0, 255, (int)greenTmp), BoundsCheck(0, 255, (int)blueTmp));
|
||||
SetPixel(hDc, xi, scanlineY, currentColor);
|
||||
}
|
||||
|
||||
x1 += slope1;
|
||||
x2 += slope2;
|
||||
}
|
||||
}
|
||||
|
||||
void Rasteriser::FillGouraudTopFlatTriangle(HDC hDc, const Vertex& v1, const Vertex& v2, const Vertex& v3)
|
||||
{
|
||||
float slope1 = (float)(v3.GetX() - v1.GetX()) / (float)(v3.GetY() - v1.GetY());
|
||||
float slope2 = (float)(v3.GetX() - v2.GetX()) / (float)(v3.GetY() - v2.GetY());
|
||||
|
||||
float x1 = (float)v3.GetX();
|
||||
float x2 = (float)v3.GetX() + 0.5f;
|
||||
|
||||
if (slope1 < slope2)
|
||||
{
|
||||
float slopeTmp = slope1;
|
||||
slope1 = slope2;
|
||||
slope2 = slopeTmp;
|
||||
}
|
||||
|
||||
for (int scanlineY = (int)v3.GetY(); scanlineY > (int)v1.GetY(); scanlineY--)
|
||||
{
|
||||
float iRedA = (scanlineY - v2.GetY()) / (v1.GetY() - v2.GetY()) * v1.GetR() + (v1.GetY() - scanlineY) / (v1.GetY() - v2.GetY()) * v2.GetR();
|
||||
float iRedB = (scanlineY - v3.GetY()) / (v1.GetY() - v3.GetY()) * v1.GetR() + (v1.GetY() - scanlineY) / (v1.GetY() - v3.GetY()) * v3.GetR();
|
||||
float iGreenA = (scanlineY - v2.GetY()) / (v1.GetY() - v2.GetY()) * v1.GetG() + (v1.GetY() - scanlineY) / (v1.GetY() - v2.GetY()) * v2.GetG();
|
||||
float iGreenB = (scanlineY - v3.GetY()) / (v1.GetY() - v3.GetY()) * v1.GetG() + (v1.GetY() - scanlineY) / (v1.GetY() - v3.GetY()) * v3.GetG();
|
||||
float iBlueA = (scanlineY - v2.GetY()) / (v1.GetY() - v2.GetY()) * v1.GetB() + (v1.GetY() - scanlineY) / (v1.GetY() - v2.GetY()) * v2.GetB();
|
||||
float iBlueB = (scanlineY - v3.GetY()) / (v1.GetY() - v3.GetY()) * v1.GetB() + (v1.GetY() - scanlineY) / (v1.GetY() - v3.GetY()) * v3.GetB();
|
||||
|
||||
for (int xi = (int)ceil(x1); xi < (int)x2; xi++)
|
||||
{
|
||||
float redTmp = (x2 - xi) / (x2 - x1) * iRedA - (xi - x1) / (x2 - x1) * iRedB;
|
||||
float greenTmp = (x2 - xi) / (x2 - x1) * iGreenA - (xi - x1) / (x2 - x1) * iGreenB;
|
||||
float blueTmp = (x2 - xi) / (x2 - x1) * iBlueA - (xi - x1) / (x2 - x1) * iBlueB;
|
||||
|
||||
COLORREF currentColor = RGB(BoundsCheck(0, 255, (int)redTmp), BoundsCheck(0, 255, (int)greenTmp), BoundsCheck(0, 255, (int)blueTmp));
|
||||
SetPixel(hDc, xi, scanlineY, currentColor);
|
||||
}
|
||||
|
||||
x1 -= slope1;
|
||||
x2 -= slope2;
|
||||
}
|
||||
}
|
||||
|
||||
void Rasteriser::FillPolygonGouraudInt(HDC hDc, vector<Vertex>& verts)
|
||||
{
|
||||
sort(verts.begin(), verts.end(), VerticiesYCompareAsc);
|
||||
if (verts[1].GetY() == verts[2].GetY())
|
||||
{
|
||||
FillGouraudSideTriangle(hDc, verts[0], verts[1], verts[2]);
|
||||
}
|
||||
else if (verts[0].GetY() == verts[1].GetY())
|
||||
{
|
||||
FillGouraudSideTriangle(hDc, verts[2], verts[0], verts[1]);
|
||||
}
|
||||
else
|
||||
{
|
||||
Vertex temp = Vertex(verts[0].GetX() + ((verts[1].GetY() - verts[0].GetY()) / (verts[2].GetY() - verts[0].GetY())) * (verts[2].GetX() - verts[0].GetX()), verts[1].GetY(), verts[1].GetZ());
|
||||
temp.SetNormal(verts[1].GetNormal());
|
||||
|
||||
float cRed = verts[0].GetR() + ((verts[1].GetY() - verts[0].GetY()) / (verts[2].GetY() - verts[0].GetY())) * (verts[2].GetR() - verts[0].GetR());
|
||||
float cGreen = verts[0].GetG() + ((verts[1].GetY() - verts[0].GetY()) / (verts[2].GetY() - verts[0].GetY())) * (verts[2].GetG() - verts[0].GetG());
|
||||
float cBlue = verts[0].GetB() + ((verts[1].GetY() - verts[0].GetY()) / (verts[2].GetY() - verts[0].GetY())) * (verts[2].GetB() - verts[0].GetB());
|
||||
temp.SetColor(BoundsCheck(0, 255, (int)cRed), BoundsCheck(0, 255, (int)cGreen), BoundsCheck(0, 255, (int)cBlue));
|
||||
|
||||
if (verts[1].GetX() < temp.GetX())
|
||||
{
|
||||
FillGouraudSideTriangle(hDc, verts[0], verts[1], temp);
|
||||
FillGouraudSideTriangle(hDc, verts[2], verts[1], temp);
|
||||
}
|
||||
else
|
||||
{
|
||||
FillGouraudSideTriangle(hDc, verts[0], temp, verts[1]);
|
||||
FillGouraudSideTriangle(hDc, verts[2], temp, verts[1]);
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
void Rasteriser::FillGouraudSideTriangle(HDC hDc, const Vertex& v1, const Vertex& v2, const Vertex& v3)
|
||||
{
|
||||
Vertex tempA = Vertex(v1);
|
||||
Vertex tempB = Vertex(v1);
|
||||
|
||||
bool changed1 = false;
|
||||
bool changed2 = false;
|
||||
|
||||
int dx1 = (int)ceil(abs(v2.GetX() - v1.GetX()));
|
||||
int dy1 = (int)ceil(abs(v2.GetY() - v1.GetY()));
|
||||
|
||||
int dx2 = (int)ceil(abs(v3.GetX() - v1.GetX()));
|
||||
int dy2 = (int)ceil(abs(v3.GetY() - v1.GetY()));
|
||||
|
||||
int signx1 = (int)ceil(sgn(v2.GetX() - v1.GetX()));
|
||||
int signx2 = (int)ceil(sgn(v3.GetX() - v1.GetX()));
|
||||
|
||||
int signy1 = (int)ceil(sgn(v2.GetY() - v1.GetY()));
|
||||
int signy2 = (int)ceil(sgn(v3.GetY() - v1.GetY()));
|
||||
|
||||
if (dy1 > dx1)
|
||||
{
|
||||
int tempDx = dx1;
|
||||
dx1 = dy1;
|
||||
dy1 = tempDx;
|
||||
changed1 = true;
|
||||
}
|
||||
|
||||
if (dy2 > dx2)
|
||||
{
|
||||
int tempDx = dx2;
|
||||
dx2 = dy2;
|
||||
dy2 = tempDx;
|
||||
changed2 = true;
|
||||
}
|
||||
|
||||
int e1 = 2 * (int)dy1 - (int)dx1;
|
||||
int e2 = 2 * (int)dy2 - (int)dx2;
|
||||
|
||||
for (int i = 0; i <= (int)dx1; i++)
|
||||
{
|
||||
float leftEndPoint;
|
||||
float rightEndPoint;
|
||||
|
||||
if (tempA.GetX() < tempB.GetX())
|
||||
{
|
||||
leftEndPoint = tempA.GetX();
|
||||
rightEndPoint = tempB.GetX();
|
||||
}
|
||||
else
|
||||
{
|
||||
leftEndPoint = tempB.GetX();
|
||||
rightEndPoint = tempA.GetX();
|
||||
}
|
||||
|
||||
float iRedA = (tempA.GetY() - v2.GetY()) / (v1.GetY() - v2.GetY()) * v1.GetR() + (v1.GetY() - tempA.GetY()) / (v1.GetY() - v2.GetY()) * v2.GetR();
|
||||
float iRedB = (tempA.GetY() - v3.GetY()) / (v1.GetY() - v3.GetY()) * v1.GetR() + (v1.GetY() - tempA.GetY()) / (v1.GetY() - v3.GetY()) * v3.GetR();
|
||||
float iGreenA = (tempA.GetY() - v2.GetY()) / (v1.GetY() - v2.GetY()) * v1.GetG() + (v1.GetY() - tempA.GetY()) / (v1.GetY() - v2.GetY()) * v2.GetG();
|
||||
float iGreenB = (tempA.GetY() - v3.GetY()) / (v1.GetY() - v3.GetY()) * v1.GetG() + (v1.GetY() - tempA.GetY()) / (v1.GetY() - v3.GetY()) * v3.GetG();
|
||||
float iBlueA = (tempA.GetY() - v2.GetY()) / (v1.GetY() - v2.GetY()) * v1.GetB() + (v1.GetY() - tempA.GetY()) / (v1.GetY() - v2.GetY()) * v2.GetB();
|
||||
float iBlueB = (tempA.GetY() - v3.GetY()) / (v1.GetY() - v3.GetY()) * v1.GetB() + (v1.GetY() - tempA.GetY()) / (v1.GetY() - v3.GetY()) * v3.GetB();
|
||||
|
||||
for (int xi = (int)ceil(leftEndPoint); xi <= (int)rightEndPoint; xi++)
|
||||
{
|
||||
float redTmp = (rightEndPoint - xi) / (rightEndPoint - leftEndPoint) * iRedA + (xi - leftEndPoint) / (rightEndPoint - leftEndPoint) * iRedB;
|
||||
float greenTmp = (rightEndPoint - xi) / (rightEndPoint - leftEndPoint) * iGreenA + (xi - leftEndPoint) / (rightEndPoint - leftEndPoint) * iGreenB;
|
||||
float blueTmp = (rightEndPoint - xi) / (rightEndPoint - leftEndPoint) * iBlueA + (xi - leftEndPoint) / (rightEndPoint - leftEndPoint) * iBlueB;
|
||||
|
||||
COLORREF currentColor = RGB(BoundsCheck(0, 255, (int)redTmp), BoundsCheck(0, 255, (int)greenTmp), BoundsCheck(0, 255, (int)blueTmp));
|
||||
SetPixel(hDc, xi, tempA.GetYInt(), currentColor);
|
||||
}
|
||||
|
||||
|
||||
while (e1 >= 0)
|
||||
{
|
||||
if (changed1)
|
||||
{
|
||||
tempA.SetX((float)tempA.GetXInt() + (float)signx1);
|
||||
}
|
||||
else
|
||||
{
|
||||
tempA.SetY((float)tempA.GetYInt() + (float)signy1);
|
||||
}
|
||||
e1 = e1 - 2 * dx1;
|
||||
}
|
||||
|
||||
if (changed1)
|
||||
{
|
||||
tempA.SetY((float)tempA.GetYInt() + (float)signy1);
|
||||
}
|
||||
else
|
||||
{
|
||||
tempA.SetX((float)tempA.GetXInt() + (float)signx1);
|
||||
}
|
||||
|
||||
e1 = e1 + 2 * dy1;
|
||||
|
||||
while (tempB.GetY() < tempA.GetY() && tempB.GetY() > tempA.GetY())
|
||||
{
|
||||
while (e2 >= 0)
|
||||
{
|
||||
if (changed2)
|
||||
{
|
||||
tempB.SetX((float)tempB.GetXInt() + (float)signx2);
|
||||
}
|
||||
else
|
||||
{
|
||||
tempB.SetY((float)tempB.GetYInt() + (float)signy2);
|
||||
}
|
||||
e2 = e2 - 2 * dx2;
|
||||
}
|
||||
|
||||
if (changed2)
|
||||
{
|
||||
tempB.SetY((float)tempB.GetYInt() + (float)signy2);
|
||||
}
|
||||
else
|
||||
{
|
||||
tempB.SetX((float)tempB.GetXInt() + (float)signx2);
|
||||
}
|
||||
e2 = e2 + 2 * dy2;
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
Reference in New Issue
Block a user